Biology Terms for invertebrates.
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| no definite shape; cannot be divided into equal parts | ||
| have body parts arranged around a central axis; round | ||
| body design in which there are equal right & left halves | ||
| sensory organs & nerves located near the front or head region | ||
| thin projections of tissue that are rich n blood vessels that allow for gas exchange | ||
| heart pumps blood throughout the body through a series of blood vessels | ||
| heart pumps blood into a body cavity without the use of vessels | ||
| cavity is filled with water to act as a support system | ||
| rigid external skeleton on the outside of an animals body | ||
| skeleton composed of a hard material such as bone that helps support an animals body | ||
| animal that possesses both male & female reproductive parts | ||
| egg & sperm unite outside the female's body | ||
| egg & sperm unite inside the female's body | ||
| animal that does not possess a backbone | ||
| organism that does not move throughout its life & stays in one place |
